Question

In the bud condition the petals are covered by left - like whorl called​

Answer 1

aestivation

The arrangement of sepals and petals in bud condition of the flower is called “aestivation”. It is may be of following types : (a) Open : If the margins of perianth members in a whorl are free with wide gap between them, then the type of aestivation is called 'open', e.g., sepals of Mustard.